The U.S. Commodity Futures Trading Commission has outlined preliminary criteria indicating that buying bitcoin without using a loan could still fall under derivatives-related regulation. In a consultation document, it said regulators should consider whether credit or leverage terms were offered and whether the purchased asset was actually delivered. The agency stressed that rejecting a credit offer may not exempt a trade, and that control of the asset, such as access to private keys, can be pivotal.

Anthropic\'s AI model Claude autonomously designed eight types of quantum computing procedures and reduced required qubits and operation counts in seven of them compared with existing optimal designs. Some designs improved resource efficiency by more than 10 times. The work focused on point addition used repeatedly in elliptic-curve cryptography, which underpins transaction signatures for Bitcoin and Ethereum. Anthropic said it did not attack cryptocurrencies or estimate the total quantum computer size needed to break them.